/****************************************************************************
 * lib/lib_internal.h
 *
 *   Copyright (C) 2007-2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

#ifndef __LIB_LIB_INTERNAL_H
#define __LIB_LIB_INTERNAL_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <stdbool.h>
#include <stdio.h>
#include <limits.h>
#include <semaphore.h>

#include <nuttx/streams.h>

/****************************************************************************
 * Definitions
 ****************************************************************************/
/* This configuration directory is used in environment variable processing
 * when we need to reference the user's home directory.  There are no user
 * directories in NuttX so, by default, this always refers to the root
 * directory.
 */

#ifndef CONFIG_LIB_HOMEDIR
# define CONFIG_LIB_HOMEDIR "/"
#endif

/* If C std I/O buffering is not supported, then we don't need its semaphore
 * protection.
 */

#if CONFIG_STDIO_BUFFER_SIZE <= 0
#  define lib_sem_initialize(s)
#  define lib_take_semaphore(s)
#  define lib_give_semaphore(s)
#endif

/* The NuttX C library an be build in two modes: (1) as a standard, C-libary
 * that can be used by normal, user-space applications, or (2) as a special,
 * kernel-mode C-library only used within the OS.  If NuttX is not being
 * built as separated kernel- and user-space modules, then only the first
 * mode is supported.
 */

#if defined(CONFIG_NUTTX_KERNEL) && defined(__KERNEL__)
#  include <nuttx/kmalloc.h>
#  define lib_malloc(s)    kmalloc(s)
#  define lib_zalloc(s)    kzalloc(s)
#  define lib_realloc(p,s) krealloc(p,s)
#  define lib_free(p)      kfree(p)
#else
#  include <stdlib.h>
#  define lib_malloc(s)    malloc(s)
#  define lib_zalloc(s)    zalloc(s)
#  define lib_realloc(p,s) realloc(p,s)
#  define lib_free(p)      free(p)
#endif

#define LIB_BUFLEN_UNKNOWN INT_MAX

/****************************************************************************
 * Public Types
 ****************************************************************************/

/****************************************************************************
 * Public Variables
 ****************************************************************************/

/* Debug output is initially disabled */

#ifdef CONFIG_DEBUG_ENABLE
extern bool g_dbgenable;
#endif

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

/* Defined in lib_streamsem.c */

#if CONFIG_NFILE_STREAMS > 0
extern void  stream_semtake(FAR struct streamlist *list);
extern void  stream_semgive(FAR struct streamlist *list);
#endif

/* Defined in lib_libnoflush.c */

#ifdef CONFIG_STDIO_LINEBUFFER
extern int lib_noflush(FAR struct lib_outstream_s *this);
#endif

/* Defined in lib_libsprintf.c */

extern int lib_sprintf(FAR struct lib_outstream_s *obj,
                       const char *fmt, ...);

/* Defined lib_libvsprintf.c */

extern int lib_vsprintf(FAR struct lib_outstream_s *obj,
                        FAR const char *src, va_list ap);

/* Defined lib_rawprintf.c */

extern int lib_rawvprintf(const char *src, va_list ap);

/* Defined lib_lowprintf.c */

extern int lib_lowvprintf(const char *src, va_list ap);

/* Defined in lib_dtoa.c */

#ifdef CONFIG_LIBC_FLOATINGPOINT
extern char *__dtoa(double d, int mode, int ndigits,
                    int *decpt, int *sign, char **rve);
#endif

/* Defined in lib_libwrite.c */

extern ssize_t lib_fwrite(FAR const void *ptr, size_t count, FAR FILE *stream);

/* Defined in lib_libfread.c */

extern ssize_t lib_fread(FAR void *ptr, size_t count, FAR FILE *stream);

/* Defined in lib_libfflush.c */

extern ssize_t lib_fflush(FAR FILE *stream, bool bforce);

/* Defined in lib_rdflush.c */

extern int lib_rdflush(FAR FILE *stream);

/* Defined in lib_wrflush.c */

int lib_wrflush(FAR FILE *stream);

/* Defined in lib_sem.c */

#if CONFIG_STDIO_BUFFER_SIZE > 0
extern void lib_sem_initialize(FAR struct file_struct *stream);
extern void lib_take_semaphore(FAR struct file_struct *stream);
extern void lib_give_semaphore(FAR struct file_struct *stream);
#endif

/* Defined in lib_libgetbase.c */

extern int lib_getbase(const char *nptr, const char **endptr);

/* Defined in lib_skipspace.c */

extern void lib_skipspace(const char **pptr);

/* Defined in lib_isbasedigit.c */

extern bool lib_isbasedigit(int ch, int base, int *value);

/* Defined in lib_checkbase.c */

extern int lib_checkbase(int base, const char **pptr);

#endif /* __LIB_LIB_INTERNAL_H */
